How can I get Firefox 21.0 to recognize plugins that work perfectly in Firefox 20.0.1?

I just upgraded to 21,0 Firefox on my Solaris 10 system. (I know, it's not supported - sue me.) I've reproduced the plugins of my installation of Firefox 20.0.1 directory. All the plugins appear in the add-on Manager and work properly, in 20.0.1, Firefox but Firefox 21.0 tells me "you do not have additional modules of this type installed. How to get Firefox 21.0 to recognize the plugins installed? Thank you.

If you copied the plugins in the plugins folder in the Firefox program folder then you should move the files in this folder to the folder browser (browser/plugins) to make Firefox to find them.

Tags: Firefox

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